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首页> 外文期刊>Metallurgist >PREDICTION OF POTENTIAL FRACTURING DURING RADIAL-SHEAR ROLLING OF CONTINUOUSLY CAST COPPER BILLETS BY MEANS OF COMPUTER SIMULATION
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PREDICTION OF POTENTIAL FRACTURING DURING RADIAL-SHEAR ROLLING OF CONTINUOUSLY CAST COPPER BILLETS BY MEANS OF COMPUTER SIMULATION

机译：通过计算机仿真预测连续铸铜坯料径向剪切轧制潜在压裂

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摘要

Based on the results of experimental radial-shear rolling of continuously cast anodic copper billets (rods) using a 10-30 mini-mill at 750 and 850°C, a part-through fracturing from within the billets has been discovered. The volume of cavities formed as a result of such fracturing appears to be more significant at 750°C. A simulation of rolling under experimental conditions was performed using DEFORM software, and the efficiency of applying a finite-element analysis computing environment for predicting fracturing was evaluated. An adequate correlation was established between the obtained estimates of the metal ductility under different deformation temperatures, as well as the probability of formation and dimensions of discontinuities and experimental data. The comparison between the shrinkage cavity depths of the billets based on the results of computer simulation has shown that the ductility of the rod material is higher at 800°C. Based on the analysis of variation in values of the rigidity coefficient under stress condition along the radius of the billet near the end of it, as well as analysis of the path described by the points located along the billet radius in the "cumulative deformation - rigidity coefficient under stress condition" coordinates while in the deformation zone, obtained as a result of computer simulation, it has been established that fracturing at 750°C should be more significant than at 800°C. Recommendations are provided regarding further use of the results of computer simulation to estimate the size of the regions, within which fracturing is expected to occur under the given rolling conditions.
机译：基于在750和850℃下使用10-30迷你磨削连续铸造阳极铜坯（棒）的实验径向剪切轧制（棒）的结果，已经发现了坯料内部的部分通过压裂。由于这种压裂而形成的空腔体积在750℃下似乎更显着。使用变形软件进行实验条件下的轧制模拟，评价用于预测压裂的有限元分析计算环境的效率。在不同变形温度下所获得的金属延展性的估计之间建立了足够的相关性，以及不连续性和实验数据的形成和尺寸的可能性。基于计算机模拟结果的坯料收缩腔深度之间的比较表明，杆状材料的延展性在800℃下更高。基于沿着钢坯半径沿着坯料的刚度条件下的刚度系数的变化分析，以及沿着“累积变形 - 刚性”中的坯料半径所描述的点分析在应力条件下的系数“在变形区内的坐标，由于计算机模拟而获得的，因此已经确定了750℃的压裂应比在800℃下更大。关于进一步使用计算机模拟结果的建议，以估计区域的尺寸，在这种情况下，预计在给定的滚动条件下会发生压裂。

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